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Free Android App for Aerodynamics calculations

Posted February 2, 2014 at 09:46 by nilyash81

The app is handy tool for Aerodynamic Engineers and Academicians. It contains Isentropic Relations, Normal Shock Relations, Oblique-Shock (Theta-Beta-Mach) Relations, Prandtl-Meyer Expansion wave Relations, Pitot Tube- Velocity computations, Y Plus or Y+ calculations.

1. Isentropic Relations - If any one of the variable from M, Po/P, To/T, Rho/Rh or A/A* is known and used as input, the remaining variable values can be computed.

2. Normal Shock- Select any known variable from list, M1, P2/P1, T2/T1, M2, rho2/rho1, Po2/Po1, and Po2/P1, input its value and user can calculate remaining variable values. The Indices 1 and 2 are for before shock and after shock respectively.

3. Oblique Shock - Theta-Beta-Mech number relation. If values of any two variable are known then user can calculate value of remaining.

4. Prandtl-Meyer expansion wave relations - Compute v1 from M1 (Mach Number before expansion wave). v is Prandtl-Meyer function. Add deflection angle Theta to v1 to get v2. From v2 compute M2 (Mach Number after expansion wave).

5. Pitot Tube - Divided in two categories. One for Incompressible Flow and Other for Compressible Flow. In case of Incompressible flow, user can input height of Pitot Tube column in Meters of Water, Mercury or Any known fluid to calculate free stream velocity. The compressible flow case takes inputs for Total Pressure and Static Pressure measured by Pitot Tube and calculates Free Stream Mach Number. User need not to worry about Subsonic or Supersonic flows. These are identified and solved accordingly.

6. Y Plus or Y+ - It calculates first cell height of grid near wall to resolve boundary layer.

7. Check points for Inputs to avoid wrong inputs and suggestions are flashed wherever possible.

If found any Bug or wrong output, please mail me regarding issue...Thanks in advance
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